Abstract
In this paper, we classify all smooth threefolds , for which the Grassmann secant variety G1,2(X) ⊂ 𝔾(1, N) (i.e. the closure of the set of lines contained in the span of 3 independent points of X) has not the expected dimension.
Received: 2008-04-15
Revised: 2009-03-23
Published Online: 2010-04-13
Published in Print: 2011-January
© de Gruyter 2011
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- Semi-classical limits of the first eigenfunction and concentration on the recurrent sets of a dynamical system
- Ree geometries
- Centralisers of finite subgroups in soluble groups of type FPn
- Visibility and diameter maximization of convex bodies
- The Bergman kernel and mass equidistribution on the Siegel modular variety
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Articles in the same Issue
- Semi-classical limits of the first eigenfunction and concentration on the recurrent sets of a dynamical system
- Ree geometries
- Centralisers of finite subgroups in soluble groups of type FPn
- Visibility and diameter maximization of convex bodies
- The Bergman kernel and mass equidistribution on the Siegel modular variety
- Lp boundedness for parabolic Schrödinger type operators with certain nonnegative potentials
- Weighted Strichartz estimates with angular regularity and their applications
- Classification of (1, 2)-Grassmann secant defective threefolds